- 9.3CriticalCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Limit the number of channel program segments The processing of channel programs, and the CCWs within them, is done recursively. As such, there is an arbitrary (but not architectural) limit to the number of CCWs that can exist in a single channel program. The vfio-ccw logic breaks these channel programs into segments whenever it encounters a Transfer-In-Channel (TIC) CCW, and the combined number of segments count towards the global limit. Impose an equivalent limit to the number of segments until such logic can be made non-recursive.
Timeline
ID reserved
By Linux
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 96% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.3.
Affected products
- affected 0a19e61e6d4c6192077ead760ba0a2d350987d4c – < 2ce00bb19db13606cda79f4b7aae4d9775de3096
- affected 0a19e61e6d4c6192077ead760ba0a2d350987d4c – < 15fb4559a7fdf0b8725e433a71cfd03a1313a48b
- affected 0a19e61e6d4c6192077ead760ba0a2d350987d4c – < a1625f66eaa1200068a0e2c05bc90e65182fc4e3
- affected 0a19e61e6d4c6192077ead760ba0a2d350987d4c – < 06f4d6e5a8af6c2072e8cd39dbc512c683ca7fb2
- affected 0a19e61e6d4c6192077ead760ba0a2d350987d4c – < 4ee94790490ae8dcc97df8597f07836c8a81bbcf
- affected 0a19e61e6d4c6192077ead760ba0a2d350987d4c – < 5405c90d6a47b3014e74ee0618a162449abbbc93
- affected 4.12
- unaffected < 4.12
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.153 – ≤ 6.6.*
- unaffected 6.12.105 – ≤ 6.12.*
- unaffected 6.18.46 – ≤ 6.18.*
- unaffected 7.1.10 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
6
- https://git.kernel.org/stable/c/2ce00bb19db13606cda79f4b7aae4d9775de3096 (opens in a new tab)
- https://git.kernel.org/stable/c/15fb4559a7fdf0b8725e433a71cfd03a1313a48b (opens in a new tab)
- https://git.kernel.org/stable/c/a1625f66eaa1200068a0e2c05bc90e65182fc4e3 (opens in a new tab)
- https://git.kernel.org/stable/c/06f4d6e5a8af6c2072e8cd39dbc512c683ca7fb2 (opens in a new tab)
- https://git.kernel.org/stable/c/4ee94790490ae8dcc97df8597f07836c8a81bbcf (opens in a new tab)
- https://git.kernel.org/stable/c/5405c90d6a47b3014e74ee0618a162449abbbc93 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-66469 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-80554)Record last updated .